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- 20:11, 20 November 2009 (diff | hist) . . (-448) . . User:Xpmath (Undo revision 32960 by Thunder365 (Talk)) (current)
- 12:15, 16 July 2009 (diff | hist) . . (-86) . . User:Xpmath (→Goals for 9th grade)
- 11:45, 16 July 2009 (diff | hist) . . (+397) . . N 1965 IMO Problems/Problem 6 (Created page with '== Problem == In a plane a set of <math>n</math> points (<math>n\geq 3</math>) is given. Each pair of points is connected by a segment. Let <math>d</math> be the length of the lo…')
- 11:44, 16 July 2009 (diff | hist) . . (+537) . . N 1965 IMO Problems/Problem 5 (Created page with '== Problem == Consider <math>\triangle OAB</math> with acute angle <math>AOB</math>. Through a point <math>M \neq O</math> perpendiculars are drawn to <math>OA</math> and <math>O…')
- 11:44, 16 July 2009 (diff | hist) . . (+240) . . N 1965 IMO Problems/Problem 4 (Created page with '== Problem == Find all sets of four real numbers <math>x_1</math>, <math>x_2</math>, <math>x_3</math>, <math>x_4</math> such that the sum of any one and the product of the other …')
- 11:43, 16 July 2009 (diff | hist) . . (+668) . . N 1965 IMO Problems/Problem 3 (Created page with '== Problem == Given the tetrahedron <math>ABCD</math> whose edges <math>AB</math> and <math>CD</math> have lengths <math>a</math> and <math>b</math> respectively. The distance be…')
- 11:43, 16 July 2009 (diff | hist) . . (+635) . . N 1965 IMO Problems/Problem 2 (Created page with '== Problem == Consider the system of equations <cmath>a_{11}x_1 + a_{12}x_2 + a_{13}x_3 = 0</cmath> <cmath>a_{21}x_1 + a_{22}x_2 + a_{23}x_3 = 0</cmath> <cmath>a_{31}x_1 + a_{32}…')
- 11:42, 16 July 2009 (diff | hist) . . (-1) . . 1965 IMO Problems/Problem 1
- 11:41, 16 July 2009 (diff | hist) . . (+250) . . N 1965 IMO Problems/Problem 1 (Created page with '== Problem == Determine all values <math>x</math> in the interval <math>0\leq x\leq 2\pi </math> which satisfy the inequality <cmath>2\cos x \leq \left| \sqrt{1+\sin 2x} - \sqrt{…')
- 11:40, 16 July 2009 (diff | hist) . . (+1) . . 1964 IMO Problems/Problem 6 (→Problem)
- 11:39, 16 July 2009 (diff | hist) . . (+13) . . 1964 IMO Problems/Problem 6 (→Solution)
- 11:39, 16 July 2009 (diff | hist) . . (+13) . . 1964 IMO Problems/Problem 5 (→Solution)
- 11:38, 16 July 2009 (diff | hist) . . (+13) . . 1964 IMO Problems/Problem 4 (→Solution)
- 11:38, 16 July 2009 (diff | hist) . . (+13) . . 1964 IMO Problems/Problem 3 (→Solution)
- 11:37, 16 July 2009 (diff | hist) . . (+13) . . 1964 IMO Problems/Problem 2 (→Solution)
- 19:36, 15 July 2009 (diff | hist) . . (+597) . . N 1964 IMO Problems/Problem 6 (Created page with '== Problem == In tetrahedron <math>ABCD</math>, vertex <math>D</math> is connected with <math>D_0</math>, the centrod of <math>\triangle ABC</math>. Lines parallel to <math>DD_0<…')
- 19:35, 15 July 2009 (diff | hist) . . (+338) . . N 1964 IMO Problems/Problem 5 (Created page with '== Problem == Suppose five points in a plane are situated so that no two of the straight lines joining them are parallel, perpendicular, or coincident. From each point perpendicu…')
- 19:34, 15 July 2009 (diff | hist) . . (+326) . . N 1964 IMO Problems/Problem 4 (Created page with '== Problem == Seventeen people correspond by mail with one another - each one with all the rest. In their letters only three different topics are discussed. Each pair of correspo…')
- 19:34, 15 July 2009 (diff | hist) . . (+407) . . N 1964 IMO Problems/Problem 3 (Created page with '== Problem == A circle is inscribed in a triangle <math>ABC</math> with sides <math>a,b,c</math>. Tangents to the circle parallel to the sides of the triangle are contructed. Eac…')
- 19:33, 15 July 2009 (diff | hist) . . (+158) . . N 1964 IMO Problems/Problem 2 (Created page with '== Problem == Suppose <math>a, b, c</math> are the sides of a triangle. Prove that <cmath>a^2(b+c-a)+b^2(c+a-b)+c^2(a+b-c)\le{3abc}.</cmath> == Solution ==')
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